OP
I assumed you knew more about balanced.
One consideration about balanced, is that sometimes, perhaps most, but not always: for a unit with both rca and balanced: the balanced output signal will be a bit stronger.
That is what I meant by 'if you already have enough volume (with rca) and clarify, without noise.
Some volume controls are ok up to a point, then they unit starts to let some noise or hum thru. So, using balanced with a stronger signal allows you to keep your volume control lower.
Cartridge output signal is another way of avoiding needing to turn the volume KNOB higher (i.e. the listening volume the same).
Usually, home systems, we don't need the superior shielding that balanced offers, however I do like that many xlr connectors LOCK in place.

